1. A cylinder of 120-mm diameter at 1000 K is quenched in saturated water at 1 atm. Describe the quenching process and estimate the maximum heat removal rate per unit length during the process.
2. A 1-mm-diameter horizontal platinum wire of emis- sivity s = 0.25 is operated in saturated water at 1-atm pressure.
(a) What is the surface heat flux if the surface temper- ature is Ts = 800 K?
(b) For emissivities of 0.1, 0.25, and 0.95, generate a log-log plot of the heat flux as a function of sur- face excess temperature, !l.Te = Ts - Tsat, for 150 Te 550 K. Show the critical heat flux and the Leidenfrost point on your plot. Separately, plot the percentage contribution of radiation to the total heat flux for 150 !l.Te 550 K.